空气泡沫/表面活性剂复合驱在明15块的应用

Application of air-foam/surfactant flooding in Ming15 Block

董俊艳 王斌 刘永安 胡艳霞 蔡彩霞 郭茂雷

中原油田分公司采油工程技术研究院，河南 濮阳 457001 中国石油大学（华东）石油工程学院，山东 青岛 266580

Research Institute of Production Engineering and Technology, Zhongyuan Oilfield Company, SINOPEC, Puyang 457001, China College of Petroleum Engineering, China University of Petroleum, Qingdao 266000, China

针对中原油田明15块油井含水上升快、产量自然递减加速的问题，提出了空气泡沫/表面活性剂复合驱技术，在空气泡沫驱油的基础上，交替注入空气泡沫与表面活性剂，进一步提高原油采收率。通过室内物模实验，考察不同驱替倍数、段塞比、交替次数对提高采收率的影响，确定空气泡沫/表面活性剂复合驱的注入参数。实验表明，当驱替倍数为0.30 PV、空气泡沫与表面活性剂段塞比为1∶1、交替次数为0~5、小段塞交替注入时，空气泡沫与表面活性剂能够发挥较强的协同作用, 采收率提高幅度最高可达22.59百分点。矿场试验表明，空气泡沫/表面活性剂复合驱能够大幅度提高明15块油藏原油采收率，并具有在同类油藏进一步推广应用的价值。

Aiming at the problems of sharp increasing of water cut and quick natural decrease of output in the oil wells of Ming15 Block in Zhongyuan Oilfield, air-foam/surfactant combination flooding is put forward. Based on the air-foam flooding, oil recovery is further improved through the alternating injection of air-foam and surfactant. This paper analyzes the effect of different displacement times, slug ratios and alternating periods on enhanced oil recovery and the injection parameters of air-foam surfactant combination flooding are determined through laboratory physical simulation. The results show that when the combination flooding time is 0.30PV, air-foam and surfactant slug ratio is 1:1, alternating injection times is 0-5 and small slugs are alternately injected, air-foam and surfactant can play the most synergistic action. The highest value of EOR can reach 22.59%. The field tests show that the air-foam/surfactant combination flooding can enhance the oil recovery greatly in Ming15 Block and this technology can be applied to similar oil reservoirs.

10.6056/dkyqt201303031